Crossville Heating and Cooling installed my heating and air conditioning unit for me about five years ago. They even had one of those plans where you could pay it off over five years with no interest. And, the payments were relatively low. Ever since then they have serviced the unit twice a year for me. They are a good company, and their employees are very nice and courteous. And kind. The unit had a ten year warranty on it, and it burnt out after about four and a half years. No problem! Crossville came out and replaced the whole unit - both inside and out - with a brand new unit! They do a good job, and they really stand behind their work! I have recommended them to all my friends!